* {
  margin: 0;
  padding: 0;
}
.box {
  width: 100%;
  position: absolute;
}
//按钮
.button {
  background: #0b4870;
  border: none;
  color: white;
  letter-spacing: 5px;
}
.button:hover {
  background: rgb(24, 144, 255);
  border: none;
  color: white;
  letter-spacing: 5px;
}
